{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Moderate"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "An update for Red Hat Hardened Images RPMs is now available.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "This update includes the following RPMs:\n\nhelm3:\n  * helm3-3.21.4-0.1.hum1 (aarch64, x86_64)\n  * helm3-3.21.4-0.1.hum1.src (src)\n\nSecurity Fix(es):\n\nhelm3:\n  * CVE-2026-63308",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2026:55180",
        "url": "https://access.redhat.com/errata/RHSA-2026:55180"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-63308",
        "url": "https://access.redhat.com/security/cve/CVE-2026-63308"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/",
        "url": "https://access.redhat.com/security/updates/classification/"
      },
      {
        "category": "external",
        "summary": "https://images.redhat.com/",
        "url": "https://images.redhat.com/"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_55180.json"
      }
    ],
    "title": "Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update",
    "tracking": {
      "current_release_date": "2026-09-08T04:35:43+00:00",
      "generator": {
        "date": "2026-09-08T04:35:43+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "5.3.16"
        }
      },
      "id": "RHSA-2026:55180",
      "initial_release_date": "2026-08-15T03:08:36+00:00",
      "revision_history": [
        {
          "date": "2026-08-15T03:08:36+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-09-04T00:36:24+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2026-09-08T04:35:43+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Hardened Images",
                "product": {
                  "name": "Red Hat Hardened Images",
                  "product_id": "Red Hat Hardened Images",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:hummingbird:1"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Hardened Images"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "helm3-main@aarch64",
                "product": {
                  "name": "helm3-main@aarch64",
                  "product_id": "helm3-main@aarch64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/helm3@3.21.4-0.1.hum1?arch=aarch64\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-aarch64-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "aarch64"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "helm3-main@src",
                "product": {
                  "name": "helm3-main@src",
                  "product_id": "helm3-main@src",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/helm3@3.21.4-0.1.hum1?arch=src\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-source-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "src"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "helm3-main@x86_64",
                "product": {
                  "name": "helm3-main@x86_64",
                  "product_id": "helm3-main@x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/helm3@3.21.4-0.1.hum1?arch=x86_64\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-x86_64-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "helm3-main@aarch64 as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:helm3-main@aarch64"
        },
        "product_reference": "helm3-main@aarch64",
        "relates_to_product_reference": "Red Hat Hardened Images"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "helm3-main@src as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:helm3-main@src"
        },
        "product_reference": "helm3-main@src",
        "relates_to_product_reference": "Red Hat Hardened Images"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "helm3-main@x86_64 as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:helm3-main@x86_64"
        },
        "product_reference": "helm3-main@x86_64",
        "relates_to_product_reference": "Red Hat Hardened Images"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-63308",
      "cwe": {
        "id": "CWE-129",
        "name": "Improper Validation of Array Index"
      },
      "discovery_date": "2026-07-17T17:01:19.070077+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2501801"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Helm. A remote attacker can exploit a denial of service vulnerability by including zero-length byte slices, such as empty files, within Helm chart files. This can trigger an index out of range panic in the Files.Lines template helper, leading to deterministic render failures during template, installation, upgrade, linting, and SDK Engine.Render operations.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "Helm: Helm: Denial of Service via malformed chart files",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "A denial of service flaw was found in Helm, a package manager for Kubernetes. The Files.Lines template helper in the chart-rendering engine does not check that an included chart file contains at least one line before indexing into it. A chart that contains a zero-length file causes an index-out-of-range panic, which stops the current template, install, upgrade, lint, or SDK Engine.Render operation from completing.\n\nRed Hat rates this issue as having a Moderate impact. Exploitation requires that a user or automated pipeline process a chart containing an empty file with Helm; the crafted chart must first be supplied by an untrusted chart source or repository. Because the panic only terminates the local Helm invocation rather than a long-running service, and does not expose or corrupt data, Red Hat assesses the impact to availability as Low, which is why Red Hat\u0027s score differs from the \"High\" availability impact used by NVD.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Hardened Images:helm3-main@aarch64",
          "Red Hat Hardened Images:helm3-main@src",
          "Red Hat Hardened Images:helm3-main@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-63308"
        },
        {
          "category": "external",
          "summary": "RHBZ#2501801",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2501801"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-63308",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-63308"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63308",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63308"
        },
        {
          "category": "external",
          "summary": "https://github.com/helm/helm/commit/ba6c9a29efa7bf9198dad6a5ec12b4fb30c96017",
          "url": "https://github.com/helm/helm/commit/ba6c9a29efa7bf9198dad6a5ec12b4fb30c96017"
        },
        {
          "category": "external",
          "summary": "https://github.com/helm/helm/issues/32279",
          "url": "https://github.com/helm/helm/issues/32279"
        },
        {
          "category": "external",
          "summary": "https://github.com/helm/helm/pull/32290",
          "url": "https://github.com/helm/helm/pull/32290"
        },
        {
          "category": "external",
          "summary": "https://www.vulncheck.com/advisories/chat2db-insecure-direct-object-reference-via-get-api-connection-datasource",
          "url": "https://www.vulncheck.com/advisories/chat2db-insecure-direct-object-reference-via-get-api-connection-datasource"
        }
      ],
      "release_date": "2026-07-17T16:14:15.472000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-15T03:08:36+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:helm3-main@aarch64",
            "Red Hat Hardened Images:helm3-main@src",
            "Red Hat Hardened Images:helm3-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:55180"
        },
        {
          "category": "workaround",
          "details": "There is no configuration change that fully prevents this issue; upgrading to a fixed version of Helm resolves it. As a workaround, verify that Helm charts obtained from third-party or untrusted sources do not contain zero-byte files before processing them with `helm template`, `helm install`, `helm upgrade`, `helm lint`, or the SDK Engine.Render function.",
          "product_ids": [
            "Red Hat Hardened Images:helm3-main@aarch64",
            "Red Hat Hardened Images:helm3-main@src",
            "Red Hat Hardened Images:helm3-main@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:helm3-main@aarch64",
            "Red Hat Hardened Images:helm3-main@src",
            "Red Hat Hardened Images:helm3-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "Helm: Helm: Denial of Service via malformed chart files"
    }
  ]
}